Heater.



B. W. DUNN.

HEATER APPLIGATION FILED OUT. 6. 1913.

Patented Oct. 20, 1914.

' lnven ror m W. Dnn p Wirncasscs place within the body or receptacle of the EMANUEL w. DUNN, or SAN raancrscofcntrronnm,

HEATER.

Specification ofLetters' Patent Application filed October 6 1 913. Seriall1'o. 793,725.

a Patented- Oct. 20, 1914.

To all whom it may concern c 7 Be it known that I, EMANUEL W. DUNN, a citizen of the United States, residing at San Francisco, in the county of San Francisco, and useful Improvements in Heaters, of which the following is a specification.

This invention relates to orchard-heaters, and relates particularly to a heater and system of heating in which a, ffuelreservoir is used to supply one or more heaters distributed through an orchard.

It is the ob ect of my invention to rovide, first, an efficient heater where all of the fuel will be consumed and wherein combustion will take place as efiicientl. as possible, and second, to supply an e cient and simple means for supplying the fuel to the individual heaters.

My systemincludes a reservoir with suitable piping or other means for supplying liquid fuel from the reservoir to the heater, and a heater having a, bodyqor receptacle into which the fuel isg-di'scharged and which the fuel is burned, the receptacle being capable of holding excess fuel which may be unburned. at any instant. The heater-itself preferably comprises the receptacle provided with an air inlet and a combustion outlet in the form of a stack. The stack may be provided with auxiliary air inlet means or not, just as desired; but it is preferable to'have' auxiliary air induction at the bottom of the stack so as to complete the combustion which has beenstarted by'the air admitted at the main induction. The major portion of combustion takes heater, and final and complete combustion takes place as the ases pass upwardly through the combustion or outlet stack.

The heated gases of combustion. aredelivered directly to atmosphere thereby directly heating the atmosphere in additionE-to the heat radiated thereinto fromthe body and stack of the heater. l It is an object in this form of he'ater to roinote complete combustion within the ieater at the generator; oil and air being fed in proper proportions. i

v I have illustrated a preferred, forrnofmy invention in the accompanying drawings, in which;

Figure heater and its connectionwith the fuel res arvo'ir, Figl .2-shows?a-.-planoview. of the State of California, have invented new ignate the body of the gases may 1 shows a vertical section of the' 3 shows a vertical-section of a heater, orm-ofheater, Fig. 4: shows a modified lfi eater and a variant form. of fuel feeder, 1g.

5 shows a heater in variant form.

the drawings the numeral 10 may desor receptacle of a heater, beerred form. Preferably, in

ing in any pref my present design the bod isoblong rather a though any suitthan square or circular, able configuration may form of heater, I place the air induction means 11 at one end of the bod and the outlet stack 12 at the other end 0 'the body; The air induction means 11 may consist in .a down drafttube 13 with or without aper-' tures 14 .throu h whichthe air passes into the interior 0 the body or receptacle 10; and the passage of; air through the tube may be controlled by a suitable damper arrangement 15 of any desired form.

, In the form shown in Figs. 1, 2 and 3f prefer to lead the liquid fuel through a pipe be used. In this.

20 from a reservoir 21, controlled by a valve or other means 22, into the down draft tube 13 somewhatin the manner, drawing. The fuel is admitted. to theheater in quantities depending u on the amount of combustion-and the quantity the fuel dripping from the pipe 20 down through the tube 13 as illustrated, into '5 cup 1. The air drawn through the tube 13. comes into immediate contact withthe fuel in the cup and carries vapor therefrom into the immediately surrounding flame. Combustion takes place in the receptacle 10 around the cup 41; and this combustion heats the oil in the cup and the entire reof heatdesired,

shown in the 1 ceptacle andcauses' the immediate vap'orr ization of the fuel which drips from the pipe 20 into the cup.,- The cup is always hot, by reason. of the flame playing around it;

and the fuel is vaporized by theheat of thecup. The cup, or any other flame exposed part, may be made of or lined with fire reasistin material, such as fire: .clay. The

heat v let stack 12 and are atmosphere. Auxiliary air be fed into stack 12- m gases of combustion rise to thecoutvarlous manners; or may bodylO. .In' Fig. 1 I have shown the stack 12. with a. series of perforations 30 through which the air is' drawn from the surroundingatmosphere' to mingle with gases of com bustion tocause their completeand perfect burning. In Fig. 3 I have shown the stack delivered directly to the p for combustion be fed into the.

12 provided with means for feeding auxiliary air for combustion beneath its lower edge to mingle with the heated gases as they pass upwardly through the stack. In this form I use a conical collar 35 provided with perforations 36 above the lower edge of the stack. The stack is supported by resting within and upon the collar 35; and an annular space isleft between the collar and stack into which air may pass. through the perforations 36. Air passes inwardly and downwardly under the lower edge of the stack and then upwardlv to mingle with the gases of combustion during their passage through the stack. In this manner I provide for full and perfect combustion of the fuel, delivering to the atmosphere nothing but clear gases without any smoke.

In Fig. 4 I have also shown an inlet 50 for air to the body 10; by this means complete'combustion may take place within the body and the body be highly heated to radiate eat in great quantities to the surrounding atmosphere. In the form shown in Fig. 4 I illustrate a heater essentially the same as that shown in Fig. 3; but I show a variant form of fuel feeding means. In the form of Fig. 4 I introduce the fuel so that it is presented within-the body 10 at a point directly beneath theair induction tube 13, so that the downwardly moving draft 'of air will pass directly over the fuel as it is fed from the pipe 40. I may provide a small cup 41 in which fuel will stand exposed to the downward draft of air. The pipe I leadsto a suitable fuel reservoir 43 which lower until a small is entirely closed. The; regulation of the supply of oil to the burner is eflected by an arrangement somewhat as illustrated. The pipe 40 has a vertical branch 42 which is open to the atmosphere at its upper end; and the arrangement is such that when the fuel has beenfed out of the reservoir to an extent sufficient to produce a partial vacuum therein and to retard the feeding of the oil, the air pressure on the open end of pipe 42 will force the oil level therein continuallyquantity of air will pass from the pipe 42 through the pipe 40 back to the reservoir 43, relievin the, vacuum and allowing more fuel to fiow. In this manner the flow of fuel is more or less controlled by the rapidity with which the fuel I is consumed in the heater.

IntFig. 5 I have shown a form of heater in which air is introduced from below and deflected by a cap 60 to ass over the fuel surface. Fuel maydrip rom pipe 62 onto the cap 60. I may introduce water with my oil fuel as illustrated in pipe 20 controlled by valve 20*. The water is immediately converted to super-heated steam; and this steam 'has the property of cleaning away all asphalt orv other deposit.

any num- As I have stated hereinbefore,

Fig. 1, through.

phere "at its outer ber of heaters may be fed from a single reservoir for fuel; and this arrangement has several advantages. In the first place, the heater may be made relatively small and inexpensively, sufiicient cubic capacit being required only for combustion of the fuel. And another particular advantage resides in the simplicity of operation of the heater. Instead of filling each individual heater with fuel, it is only necessary to fill a single reservoir for a reat number of heaters, thereby greatly re ucing the labor required of keeping the heaters always in condition for emergency operation.

I claim 1. An orchard heater, comprising a combustion receptacle, an air inlet tube for the receptacle, a combustion outlet stack for the receptacle, auxiliary air inlet means admits ting air to the stack, and means to feed fuel into the air inlet tube and into the draft of air drawn through the air inlet tube into the receptacle.

2. An orchard heater comprising a combustion receptacle, an air inlet tube for the receptacle, a combustion outlet stack for the receptacle, auxiliary air inlet means admitting air under the lower edge of the stack, and means to feed fuel into the air inlet tube and into the draft of air drawn through the air inlet tube into the receptacle.

3. An orchard heater, comprising a combustion receptacle, an air inlet tube extending into the receptacle, a combustion outlet stack for the receptacle, auxiliary air inlet means admitting air under the lower edge of the stack, and means to feed-liquid fuel into the air inlet tube.

4. An orchard heater,

comprising a combustion receptacle,

a perforated air inlet tube extending into the receptacle, a damper at the outer end of the tube to control the inlet of air thereto, a combustion outlet stack on the receptacle, means to admit air under the lower edge of the stack to its peripheral portions, and means for feeding liquid fuel into the perforated inlet tube to be carried by the air draft into the receptacle.

5. A11 orchard heater comprising a com bustion receptacle, an air inlet tube extending downwardly into the receptacle open to atmosphere at its upper end and open to the receptacle interior at its lower end and havmg. perforations in its walls inside the receptacle, a combustion outlet for the receptacle, means for feeding auxiliary air into the combustion outlet, and means for feedmg fuel into the tube above the perforations therein into the draft of air. drawn through the inlet tube.

6. An orchard heater, comprising a combustlon receptacle, an air inlet tube extendmg into the receptacle and open to-atmosend and having perforations in its walls inside the receptacle, means In witness that I claim the foregoing I to control admission of air to the tube, a} have hereunto subscribed my name this 9th 10 combustion ioutllet stack lon the receptacle, day of September 1913. means for ee in auxi iary air into t e 5 combustion outlet, and means for feeding EMANUEL DUNN fuel into the tube above the perforations Witnesses: I therein into the draft o-fair drawn through 7 J58. H.- B'ALLAGH,

, the inlet tube. I DRU. L. HOFFMAN. 

